usb: phy: Check initial state for twl6030

We need to check the state for the PHY with delayed_work
as otherwise MUSB will get confused and idles immediately.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 15 insertions, 2 deletions

diff --git a/drivers/usb/phy/phy-twl6030-usb.c b/drivers/usb/phy/phy-twl6030-usb.c
index c66a447c3dfe..a72e8d670adc 100644
--- a/drivers/usb/phy/phy-twl6030-usb.c
+++ b/drivers/usb/phy/phy-twl6030-usb.c
@@ -97,6 +97,9 @@ struct twl6030_usb {
 
         struct regulator                *usb3v3;
 
+        /* used to check initial cable status after probe */
+        struct delayed_work     get_status_work;
+
         /* used to set vbus, in atomic path */
         struct work_struct      set_vbus_work;
 
@@ -280,6 +283,15 @@ static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
         return IRQ_HANDLED;
 }
 
+static void twl6030_status_work(struct work_struct *work)
+{
+        struct twl6030_usb *twl = container_of(work, struct twl6030_usb,
+                                               get_status_work.work);
+
+        twl6030_usb_irq(twl->irq2, twl);
+        twl6030_usbotg_irq(twl->irq1, twl);
+}
+
 static int twl6030_enable_irq(struct twl6030_usb *twl)
 {
         twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
@@ -290,8 +302,6 @@ static int twl6030_enable_irq(struct twl6030_usb *twl)
                                 REG_INT_MSK_LINE_C);
         twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
                                 REG_INT_MSK_STS_C);
-        twl6030_usb_irq(twl->irq2, twl);
-        twl6030_usbotg_irq(twl->irq1, twl);
 
         return 0;
 }
@@ -377,6 +387,7 @@ static int twl6030_usb_probe(struct platform_device *pdev)
                 dev_warn(&pdev->dev, "could not create sysfs file\n");
 
         INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
+        INIT_DELAYED_WORK(&twl->get_status_work, twl6030_status_work);
 
         status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
                         IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
@@ -401,6 +412,7 @@ static int twl6030_usb_probe(struct platform_device *pdev)
 
         twl->asleep = 0;
         twl6030_enable_irq(twl);
+        schedule_delayed_work(&twl->get_status_work, HZ);
         dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
 
         return 0;
@@ -410,6 +422,7 @@ static int twl6030_usb_remove(struct platform_device *pdev)
 {
         struct twl6030_usb *twl = platform_get_drvdata(pdev);
 
+        cancel_delayed_work(&twl->get_status_work);
         twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
                 REG_INT_MSK_LINE_C);
         twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,